Group 1

Question 1

Describe what you would see when a group 1 metal is added to water

[3 marks]

Answer 1

Effecrvescenece as hydrogen bubbles are produced

The metal disappears

The metal floats

also the metal moves on the surface

Question 2

Desrcibe the trend in reactivity as you go down the group 1 metals

[1 mark]

Answer 2

The reactivity increases as you go down the group

Question 3

Explain the trend in reactivity of group 1 metals

[3 marks]

Answer 3

As you go down the group, the number of energy levels increases , this increases the distance between the nucleus and the outer shell electrons

So the force of electrostatic attraction between the outer shell electron and nucleus decreases,

So the outer shell electrons are more easily lost

Question 4

State two similarities between hydrogen and the elements in Group 1

[2 marks]

Answer 4

It has one electron in its outer shell

It forms an ion with a 1+ change

Question 5

Mendeleev changed the position of iodine in his version of the periodic table so it was in the same group as chlorine

Give two reasons why he put iodine in the same group as chlorine

[2 marks]

Answer 5

Iodine has similar properties to the other elements in the same group

Iodine is diatomic

Question 6

Desrcibe hwo the numbers of protons and electrons are used to place elements in the modern periodic table

[2 marks]

Answer 6

Elements in the same group have the same number of electrons in their outer shell

Elements are placed in order of their atomic/proton number

Question 7

Why is graphene strong?

[3 marks]

Answer 7

Graphene is a giant structure
There are covalent bonds between the carbon atoms
These covalentbonds are strong